code: def test_struct_of_array(self):
      self.assertEqual(str(dshape("5 * int32")), "5 * int32")
      self.assertEqual(
          str(dshape("{field: 5 * int32}")), "{field: 5 * int32}"
      )
      self.assertEqual(
          str(dshape("{field: M * int32}")), "{field: M * int32}"
      )
  
imports: from __future__ import absolute_import, division, print_function
  import ctypes
  import unittest
  import pytest
  from datashader import datashape
  from datashader.datashape import dshape, error, DataShape, Record
label_desc: Use image node_id 14 for calling the TestDataShapeCreation obj's underlying member method code with example usage: obj.test_struct_of_array() without return types